I would recommend a Sub-Zero 424. They have both a free-standing 24" and a built-in "24 wine unit with dual temperture zones. We love ours and use it daily! Not a cheap product, but very high quality! Not too sure about other brands, I just know Sub-Zero makes a quality product. Never had a problem with the unit, but I hear they have the great customer service!

Good luck with your search!

http://www.subzero.com/WineStorage/424FSWine

Here is a link that might be useful: Sub-Zero 424 Free-Standing Wine Storage

There are only 3 manufacturers (that I know of) that make a true dual zone unit: Sub Zero, U-Line, and Marvel. They have varying price points and features...I would suggest taking a hard look at all three, however

I guess if you live in the same district and most probably work for Wolf or Subzero you would get great customer service.

I just purchsed a KitchenAid. I didn't find much of any good reviews for any of the brands!

As for DF, I didn't find one DF fuel option that either wasn't crazy expensive (well over $2k) or while being "dual fuel" (e.g. one zone say five degrees different than the other) wasn't good enough to store both whiles (mid-30s?) and reds (55-59). Especially if you're storing wine for months.

Most buyers end up use the refrigerator to get whites to drinking temp... or spending well over $2k, my research tells me.

Liebherr has true dual zone runs around $2400 last time I was looking. I think Perlick had one as well.

We have the U-Line 2-drawer, Wine Captain model and have been very pleased with it so far. It is very quiet and hasn't had any problems in the three plus years we have had it. I also really like the drawer configuration.

We were fortunate enough to find a floor model for around $1000, so it is worth checking around to see what your dealers might have available.