When the mini was release, it was the MB internals in a small box (sans the wireless n controller). I would expect the update to be essentially current MB internals in the same mini form factor.
I have a MB with GMA950 and have compared it to a current MB with x3100 and came to this conclusion: Once you look beyond the specs on paper, in the end your experience will be nearly identical post-update.
Sure a few things will be faster like video encoding, but the mini was never intended as a work horse.
I'd recommend just buying a refurb now. If it's not fast enough you can return it or sell it on ebay after the update. These little guys hold their value quite well.
(I dont think Apple charges a restocking fee on refurbs)
I have a MB with GMA950 and have compared it to a current MB with x3100 and came to this conclusion: Once you look beyond the specs on paper, in the end your experience will be nearly identical post-update.
Sure a few things will be faster like video encoding, but the mini was never intended as a work horse.
I'd recommend just buying a refurb now. If it's not fast enough you can return it or sell it on ebay after the update. These little guys hold their value quite well.
(I dont think Apple charges a restocking fee on refurbs)