Hi Wemfan,
I did a little research for you since you're under the weather. Here's what I found out assuming you're going to choose between Golden Ear, Gallo, KEF, Aperion and KRK speakers:
Golden Ear Triton Three-the matching SuperCenter X center ($599) measures 20"wide x 5-3/4" high x 11" deep
Gallo Strata 2- the matching center speaker ($799) laid horizontally measures 13"wide x 5" high x 6.5" deep
Kef LS50- Using a 3rd LS50 as a center would not fit on your shelf(too tall) but at least one KEF dedicated center($299) would fit.
KRK-these are similar in size, but much less expensive than, the KEF LS50s. They are also too tall for you're shelf space and the l+r spkrs would need stands. They may offer a dedicated center but I didn't see one.I'll leave it to you to decide on these.
Aperion-these are similar in size, but much less expensive than, the Golden Ear tower speakers. However, they lack built in subs so you may find you need one of their 7 subs ($350-900). They also offer matching centers and at least one will fit: $160 4C that measures 12.8" wide x5.33" high x 5.5" deep and the 5C that measures 19.33" wide 7.33" high x 8" deep.
The first 3 suggestions are all highly rated speakers, as reviewed by professional reviewers, and will most likely give you the best sound but at the highest costs. The last 2 suggestions I have not read reviews on , but they still may meet your sound quality requirements, and they definitely offer the lowest costs.
In my opinion, and not solely because I suggested them, I believe the Golden Ear speakers offer the most elegant solution based on your needs for the following reasons:
1. You are assured of high quality sound since you can probably audition them first at a local dealer (go to www.goldenear.com and select the 'dealer' menu choice to find your nearest dealer).
2. The list price of 2 Triton Three spkrs and matching SuperCenter X center($2,600) is not cheap but is not the most expensive suggestion, either. Your local dealer may offer you a discounted package deal, especially if you buy 3 speakers and a suitable 3-channel amp from him.
3. Each Triton Three spkr has a built in subwoofer with its own amplifier, which not only saves floor space but also improves sq.
4. If you pick a very good looking, as well as a very good sounding, 3 ch amp to go along with the very good sounding and very good looking towers and center, you'll be a lock to win multiple room design awards and prizes.
5. The matching SuperCenter X spkr fits perfectly into your new rack center channel shelf position. You may view this as just a fortunate coincidence, however, many in the know would confirm that it's an obvious sign from the Audio Gods concerning the ideal choice.
I'm sure you know I'm just having a little fun, however, the Emotiva 3-ch is a good sounding and good looking (hint, hint) amp that would nicely complete your very good sounding and looking bedroom audio system.
Hope this helped,
Tim