If you could get a brand new prev gen 2.53Ghz mini for $507 to use as a HTPC compared to the new base model mini or impending appleTV refresh, what would you do and why?
I'd get the new mini. I'm using the earlier revision of the previous version (early 2009) as a HTPC, personally, and I love it....
...the internal power supply means one less brick laying around (possibly lower power draw as well, depending on how good the internal supply is)..., built-in HDMI completely bypasses the need for converters, dongles, or audio cables...
Sounds like you've already got a preference, and I've certainly go no complaints about the older models, but the power supply situation between the new mini and the Time Capsule isn't really comparable; the Time Capsule is a small, closed, plastic device with little ventilation and a big 3.5" drive, and the Mini is a device with heatsinks and a fan dumping heat, plus a metal case, which is more thermally conductive, and a much-cooler 2.5" drive....apples internal power supply issues make me nervous (the time capsule, they just admitted to it having major problems)