Madhf, I heard the old Angstrom had a rather high "noise floor level"! Do you own this piece?(was like $1k new) My old Acurus ACt 3 had a tad bit higher nose floor than the better pre/pro's out there. And as good sonically as that piece was, it's backgroud noise level was barely adequate, although otherwise that piece sounded as good as I'd ever need for movies! I heard the Angstrom was worse! What's your honest take on that point???
Anyway, I think it's a bit unfair to say DTS dewarfs DD sonically. These are often pretty close overall for most peoples applications I find. Yes, there are times when DTS is clearly better on a particular transfer. Yet, I wouldn't state it as being the only way to watch movies, and that DD is junk comparatively! I think that's a bit too biased and drastic. There are a ton of sonically excellent (considering) DD mixes, that sound superb, and do the job nicely for even the most discerning systems!
And, as for THX, that is really a "post processing" proceedure! It's not a software encoding format or whatever. This is something that is processed into a source "after the fact", and is intended to be an enhancement to either Stereo pro logic, DD, DTS or whatever! We're talking about apples and oranges here.
So,you can chose to either use it or not on any pre/pro you buy that offers it...a non issue here really.
I think If the price was cheep enough on a processor that sounded really good overall for DD, I wouldn't sweat the DTS that much! I find I moslty listen to DD, which is much much more widely common anyway. My system sounds so good anyway, and my picture so good, I don't really sweat the differnce. Again, yes, I find DTS better often, but not so much more that I just NEEED TO HAVE IT! Good DD sufices just fine for me for movies. But, you judge.
Still, all that non-sense aside, I would pick up an old used Acurus ACt 3 w/Bass mgmt upgrade for $500-600 used before ever picking up a decidedly "soncially inferior" lex DC1!....And you can take that to the bank! The Act 3 is sonially a very very good clean dynamic detailed pre/pro for DD/DTS/PCM! Good luck