Opinions on Injector size and brand

I'm gonna be gettin new injectors pretty soon and I was wondering if you guys recommend a specific brand? Also I was probably be getting 550's but not sure if I should get more. My mods are 13g's, LS6 MAFT, Greddy Profec B Spec 2, Walbro 255lph HP. I'll also be getting an ATR downpipe with a high flow cat very shortly. Do you think that I will need to rewire my fuel pump? It is not installed at the moment but it will be before the injectors and downpipe are.

I'd go with 550s, I think larger would be overkill. Generally the number is good for close to the same hp, so 550ccs should be good up to 550hp, and 13G turbos wont be making that much.
Check this out:http://www.3sxperformance.com/fuel.asp
Denso is a good brand.

As far as the fuel pump rewire, you probably should...here are directions:
http://www.stealth316.com/2-fuelpump-rewire.htm

Lastly, with those mods, you should be looking into an air/fuel controller. The MAFT will allow you to tune for your injectors, but it doesn't allow for fine tuning across the board. Check these out:
http://www.3sxperformance.com/fuel.asp

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7925195222&category=42604&sspagename=WDVW would this rewire kit do everything that I need or should I do exactly what is on Stealth316. Would you recommend the SAFC or the SAFC 2 for my car? I see that the SAFC 2 allows for finer tuning but I was wondering if it would be entirely necessary for my car.

I would do it like stealth316 says. the ebay auction seems overpriced and I don't know if they actually rewire it to the battery, or if they are simply saying use larger wire. Stealth316 recommends 6 or 8 gauge, and this auction is for 10 gauge.

As far as your other question, I don't own either, I havn't modded that far yet, so I can't really offer any personal opinion as of now. However, I'm searching for a good comparison on the two that would help you decide what is good for you.

I think i'll probably go with the SAFC-2 because you can buy them brand new off of ebay for about $240ish which seems like an awesome deal compared to the other places selling them.

yeah the afc-2 has some nice features

I doubt I will ever be doing anything that would require the use of 720cc injectors or larger so i'll probably just go with the AFC-2. How hard is it to install/operate?

from what i've been told its not that hard, takes some time, but what doesn't.

and its not hard to operate, just so many things you can do with it, can sorta overwhelm you

http://rdmelton.autoeducation.com/cars/stealth/afc.html

This might help with installation