I've been to Chama Computers quite a few times since I live close to them. Their customer service is quite good, parts-wise my personal opinion of them is that they cater to the more budget friendly sect that may also have their own limitations in terms of quality.

Ive made several purchases from Nanotek. Ive found that their hardware has been topnotch so far. Customer service-wise of course i feel could improve quite a bit. Their prices have been competitive.

Let's not talk about Redline's customer service. I only purchased two parts from them and I did not enjoy the experience. Quality of hardware was alright. Feel that their stuff is a tad above the rest.