Dips vs Bench for strength

Hey all... 
I was contemplating switching out bench 5x5 with heavy weighted dips 5x5 in my routine.  The reason being is that with bench, I struggle with lockout, i.e. I need triceps strength... Im currently on sl 5x5 routine and the reason why bench is stalling is due to triceps (same exact reason with OHP as well).  I was thinking about switching out bench with 5x5 HEAVY weighted dips progressing workout to workout for about 6 weeks, then Bench heavy again.  Sound like a plan?

Oh and I will also do 3x8 CGBP at the end of workout A

so workout A will look like
Squat 5x5
Weighted Dips 5x5
Pendlay Row 5x5
CGBP 3 x 8

I was also thinking about adding some sumo good mornings on workout B for some posterior chain load.. 3 x 10-12... this was actually recommended to me by a PT who is specialized in strength training.
thoughts?

Chest dips?

yeah that's what I intend to do.

if I do CGBP itll be speed work more than anything with a weight I can do 8 reps comfortable with... ill see how things work if its too much ill obviously drop it

I don't think you NEED to do dips as a bench assist Little Sprite, especially if you're a novice. The press is all you really need.

Personally, I find benching a better overall pushing exercise for strength than dips. The ROM is greater and is also always the same. You can cheat on dips easier by using momentum and the ROM will often vary from rep to rep.

dips are kicking my ass harder than bench press.

I agree with this, because I don't think you should be adding dips to SL, especially not if you're intending to do CGBP as well. Think about it, then you'd be doing bench press, dips, CGBP and press. That means heavy pushing work three times a week every week, which sounds a bit over the top since you only have one heavy pulling motion in SL.

If anything, replace the bench press with chest dips, but even then, I wouldn't add CGBP since you have the press like joe101 says. At least don't add it without adding a vertical pull (I'd prefer a supine grip since you already have a pronated grip pulling exercise) to the plan as well to keep everything balanced.

He has lock out trouble and peoples solution is to ignore it.. as usual.
This is why I hate SL and so on, just no room for improvisation what soever. Once some sticking points rear their ugly head, don't just accept them or "do 3x3" these will only work for so long, where as assistance work can really bust a plateu (continually) and keep the body from accomodation.

If you have weak triceps I can recommend some tricep assistance work. Continue doing your bench, it's a great exercise. Just add in dips and maybe one functional isolation if you feel you need it. However after Bench + Dips I would imagine your tri's to feel pretty stoked!

If you do feel you need an isolation, just experiment and see which ones you like and can feel working. I personally like JM press and single arm overhead extensions. However someone else might like rope pushdowns and overhead lock outs with very heavy weights. But I mix it up on those fairly frequently and add weight reguarly.

However it depends how long you've stalled, if it's just a few weeks, you might not need any assistance and it's just a sticking point you have to persevere through. However if we're talking 2-3 months, it's time for change.

King's suggestion of the higher rep range is a great one. The higher rep range can take the stress off joints (the 5x5 will be stressful although not in a bad way).

Well, if you're worried you might have to re-groove your movement pattern, you can just keep practicing light bench presses every time you go to the gym :-)