I had a knukoncepts kit in my jetta, it was fine.
If you're looking for a really nice kit, above and beyond the basic cheap plastic terminals and stuff, look at the stinger kits.
You should get the 4 gauge kit. I think 8 gauge is only recommended for 800 watts.
With any of those kits, tho, you'll probably need to get a bigger fuse than they come with for that amp. I'd put a 200A fuse by the battery, for the wire itself, and then put the proper fuse after the distribution block right before your amp.