"Southern Gospel Vocals", huh?
Cool...that is exactly what I do.
I have heard some good things about the Sebatron stuff, though I have never personally used it (nor heard it, for that matter). However, when you get up into that price range I think you will like just about everything.
I, too, just recently (as in, this week) upgraded my pre. I spent alot of time researching. Some of the folks who helped me most were "Dot" on this forum (A.K.A. Dan Richards) and Todd at SoundPure.com . Another valuable resource was Dan's website
http://www.thelisteningsessions.com , where you can actually listen to clips of different pre and mic combos.
I, too, wanted the rich and full and in your face kind of sound. Something that would cut through the mix yet still sound natural and warm. At first, I was recommended
the Universal Audio 2-610. I got a good deal on one, so I ordered it. It did sound nice and rich and warm. However, I sometimes do TONS of vocal tracks (as you know being in SGM yourself). 4 parts plus stacks. So I didn't want the "color" of that pre to get in the way. So, to test it I recorded myself singing 4 parts, 4 times each (16 tracks total). Just what I feared...the definition of the tracks was totally lost in the "color". It became rather mushy sounding.
So I returned it.
My search narrowed down my choices to 4:
Avalon 2022
John Hardy M1
A Designs MP-2
Great River MP-2NV
I ended up going with the A Designs (mostly because I felt my current mics would benefit most from this pre's character and sound). The A Designs is also a tube pre (like the 2-610). However, unlike the 2-610, the "color" is is slight and doesn't get in the way. I did my "16 voice" test again on the A Designs and there was a rather substantial difference in the sound. The voices were crisp and defined yet rich and warm.
Anyways...I hope this helps.
Do you record any SGM groups? I have been around it for years and even traveled with my family full-time for 12 years. My daughter has married into a full-time group, the Needhams (whom I just recorded their Christmas album for, by the way). Perhaps we have some mutual friends...