I see that you just recently signed up...so let me shed some light on the fact that JVC has to pay to get that receiver THX certified because it must go through all those tests! So you can bet that there passing that down to their customers....I think their might be some DSP modes associated with the THX label but I think that they are pretty useless although I have never used them. Take a look and HK, Pioneer, Denon, Onkyo, Yamaha...you will find some quality stuff there!
True, if you educate yourself well about AVRs then THX shouldn't be such a significant factor. Basically THX Does all the evaluating for you and then slaps their name on it. But as Michael stated, this is quite expensive for manufacturers and it increases the price of the unit.
One of the things the THX people want in a receiver--in my opinion the most important part of their receiver certification requirements*--is enough power to enable the CLEAN reproduction of a very wide dynamic range (i.e. from the actors whispering to the unexpected explosion that occurs right behind them), and this JVC receiver has a power amp that is nothing to giggle at:
120 watts x 2 min. RMS, both channels driven into 8 ohms from 20Hz to 20kHz with no more than 0.02% THD
And while not a 100% accurate measure of quality, a receiver that weighs 52lbs is no sissy. And the three separate power supplies it has I'm sure contribute to this.
And the bass management for the multichannel input is a good feature for surround music fans.
The MSRP is $2,499 so for $1200 I think this is a really good deal.
* "Controllers, Receivers and Amplifiers: Minimal noise and distortion levels and unparalleled power reserves deliver accurate, pristine sound quality under all conditions." (quoted from here) Though some of the other things they require are now pretty much standard on most decent recievers/processors, except for the decorrellation and re-equalization features which IMO are still useful.
There are some good deals out there right now on Pioneer Elite if you really want THX. Probably about half of what you are looking at spending. That would give you enough leftover for an SVS
Im not saying theres something wrong with wanting THX. Im just saying you can easily get those same specs out of a receiver thats not THX certified. Maybe even better.
Though one advantage for non-HT hobbyists as far as seeing a THX symbol on the front panel is that it gives them a little bit of reassurance that the receiver isn't a total piece of junk. Can you imagine what it must be a like for a Regular Joe kind of guy to walk into an A/V store & try to pick out an entire system based on just what the little info cards say? Hell, WE often have a hard time figuring out this stuff, so it's no wonder there are so many HTiB's available nowadays that are "plug-n-play".