Computer Repair

Any good suggestions on a moderately cheap Server PC. I need a faster connection and I want to hook up a network with 2 other PC's and the server I am using(not mine) has crappy upload/download ratios. Any suggestions on how to look into this for info and pick up a tidbit here and there.

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Cooler Master HAF 932(Full Tower)
Intel® Core™ i5-750 Processor
(8M Cache, 2.66 GHz)
ASUS P7P55 PRO Motherboard
Samsung S27A550H 27"
(Class Widescreen LED HD Monitor)
5 WD scorpio black HDDs
2 DVD writer/burners
WIN 7 Ultimate X64
8 GB of RAM

"The only problem with troubleshooting is that sometimes trouble shoots back."