To continue from where I left off previously, my installation of Ubuntus Feisty Fawn (7.04) has been full of nothing but pleasant surprises. It just works!
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See, my point is this with all the coverage of Ubuntu here: You get a full-featured, fast and capable operating system for the cost of a little time invested. Not a bloated system that costs more than its worth! Many would argue with me but the sweet part of all of this is that its a personal choice. If you want to go through the hassles of upgrading your hardware (especially if you have an older system) and then pay several hundred dollars just for the system itself, then by all means go ahead. Its your money.