Been using my Thinkpad laptop for years now, its on its last legs, and I think I want to just get a nice desktop to replace it instead. But its been years and years since I've used one at home. What are the best brands and value out there right now? I don't need anything fancy for gaming or anything.Just basic surfing and streaming, possibly some engineering software (mostly data acq). I don't think I need quad core processors. Dual should be enough, right?