3" OME/ToyTec or 4"BDS

So it's between the:

OME/ToyTec Complete Suspension / lift kit
Dakar OME CS047R Leaf Pack
Assembled Front Coil Overs
885 Front Coils
Front Top Plate Spacers for Full 3"
Front Diff Drop Kit
90021 Front Shocks
Rear shock stone guards.

PRICE$1540 - incl, Shipping & NOT installed.

or

BDS 4" Suspension Lift Kit

PRICE$1700 + $1760 installation.

I've heard nothing but praise for the OME stuff and I'm definitely close to a decision.

I've boiled it down between these two kits. If there is any immediate recommendations against either they'd be greatly appreciated since I'm WAY less familiar with the BDS system.

Pros & Cons anyone? Other options?

So, A few points:

1. I'd like to run 17x9 wheels with a 285/70/17 which would work perfect with the 3" OME/ToyTec but the BDS kit won't allow for this. I'd have to go 18x9 (not preferable)

2.BDS requires some chopping and welding. Doesn't sound like something i wanna have done. Could I get some ELI5 on this?

3.With a 4" lift what is the best tire size? I was thinking 285/75/18 would be the biggest I could go with some expected clipping. Am I in the ball park?

4. I'd say I'm 70%-30% On-Off road. Are new UCA's a requirement? It's all i hear about, but I'm not often aggressively taking on trails.

5. I heard Dakar's are the bomb. Will the Dakar leaf pack make my rear height higher than the front? If I wanna stay level should I choose the Toytec 2" AAL option, 3 Leaf mini pack or the 1.5" block kit?

Thanks any info is appreciated.