certainly.
Your upload speeds haven't reached the inherant speed liimits of usb 1.1 (approx. 2.5 mpbs sustained throughput)
i'm not saying your cmputer is a pos, (okay, truthfully, to meit is, but if it does what you need it to then it's not for your sake)
The deal is that you're not getting anything 'wonderful' by making your cable download 3 vs. 2.5- you really should just be happy that you have that wonderus upload that you're so stoked about. The extra .5mbps download will probably not be noticed on downloading large files, (normally held back by server restraints) so really unless you're just questing for the fastest you can get, i'd leave it alone. If you are questiong for the best you can get from your provider, take the suggestions of hte members of the forum and get a network card.
Chris