Whoa... a host of questions. Some of them tough to answer.
Let me tell you what I'm using. I have a room that isn't much differnt from your set-up except I don't have the kitchen attached. Room dimensions are 11.5" x 19.5" x sloping ceiling to complex to describle.
The 2641 & the LCR will not be much different in terms of performance. They use the same driver compliment with just a change in the orientation of the drivers. Many people make a big deal over the dispersion characteristics of the LCR but it's not an issue when designed properly (the LCR is). The 2641 will have the advantage of being a nicer form factor for a floor standing design. The LCR is better suited to horizontal placement and for people who want to put them on stands. The 2641s are only 12.5" deep with front porting. They don't need a stand and they are proportionally very nice being tall and slim.
In my room I'm using three 2641s across the front and a variation of the 641s for the surrounds. I'm building an acoustically transparent screen (details coming soon) which will have all three speakers (left, center, right) behind the screen. Since there is no such thing as acoustically transparent (the screen causes about a 1db falloff per octave above 1.5K) I'm going to compensate for it in the crossover design. I'll publish the details on our site for those who wish to copy the screen design. The screen with manually adjustable masking is only $100-$120 in materials so it's a cost effective screen with a gain of about 1.0.
If you are going to use a more traditional screen with speakers beside, below or above the screen the LCR will be necessary due to space constraints. You could use either the 2641 or the LCR on the left and right.
I wouldn't worry about overpowering the room. You have plenty of control with the 1014 with it's EQ functions.
Oh... and I totally agree with you on the PCBs. They are not an option because I don't want people foolishly trying to save money. All you have to do is build a couple speakers using point to point and then build the same speaker with the PCBs. I gaurantee that you will 100% agree with me after this exercise that the PCBs are worth their weight in gold. People just don't realize it though until after they have had the experience. I'm acting paternalistically to help my customers.
The PCBs also make the finished product MUCH more professional looking, ease install issues and greatly help cut down on assembly errors.
