ahhhh the trails and tribulations of buying an Apple computer
no one knows when they will be updated, only a handful of rumors can suggest when an update will happen - which they are usually spot on
I am in the same boat as you are though....buy now? or wait?
I say,
do both! only a small percentage of computer users are aware of websites like this. So not every soccer mom, executive, teen bopper and dad knows about an update. I've seen the Apple store flooded with customers buying computers 1 day before an update - the recent iMac is a perfect example.
With that being said, you can buy it now, use it and ENJOY it, then when the rumors start to heat up, start to list it on eBay. Worst comes to worst you might be out by $200 for depreciation value. But with knowing about rumors, you will get the highest return rate for it, because a refresh diminishes the value of previous generations....because again, not everyone knows about rumors. These users will go on eBay and think "Golly! An almost new MBP for $200 less then store shelf price, and no tax!" - not knowing there will be an update next week.
I am not a huge techie and don't keep up with the times, but after reading a few threads, this is going to be a huge update.
Right now I have a 24" Alu iMac, I really need a laptop because I am back in university and traveling a lot to friends / relatives + work. I am going to sell iMac now, buy a MBP, then next February (expected time of refresh) list MBP on eBay, then get new gen MBP....but hey, thats just me