help on center speaker

So I guess in this case I have 2 options:
- Upgrade front speakers: I am thinking of the Linn Ninka (50Hz-20KHz), then set them as full range front l+r and crossover the rest of the speakers (Linn Trikan in the center and 3 Linn Unik in the back). Also the Ninka are matched to the Trikan center speaker. A bit expensive, but I will try to get them used. If I get the Ninkas I am thinking of also buying a better power amp (NAD THX 216).
- Buy a second sub (Linn Affect) - this is a cheaper option - used can be found for like $700. The only problems is that my receiver does not have l+r outs for the sub (it has only sub1 and sub2).

I am thinking that option 1 is better. Any ideas?

and regarding the center speaker - I got the Linn Trikan.

If the Trikan goes well with your Index, why not sit on that for a while? Catch your breath and let your budget prepare for what you might want to do next. You may not even need a second Afekt. Remember that the objective is to build a system that you like, not to spend a lot of money as fast as you can.

Do you really need 6.1? Do you watch a lot of movies with 6.1? Do you need a centre rear to fill in a space in your room? If you don't, if you can be happy with 5.1, another option, instead of two Ninkas, and at roughly the same price, is four Katans. Sell the Index and Uniks. The Trikan matches the Katan as well as the Ninka. It's a sideways step from your Index, rather than an upgrade, but it provides an upgrade path to a 5.1 Aktiv system. Katans all around with a Trikan would be sonically matched and upgradeable to Aktiv. Ninkas/Trikan/Unik would be matched in front but not as well in the back, and would not be upgradeable to Aktiv, unless you later replaced the Uniks.

I obviously can't say what's best for you, but these represent options in addition to what you proposed above.

I find your thread quite interesting because I am in the middle of doing the same thing, i.e. building a HT. I have Ninkas, a Trikan, and Katans. I have an Afekt sub that I'm not using since it's too small to use with Ninkas, although it is big enough to use with Katans. I'm skipping the 6.1/7.1 options at this point and concentrating on 5.1

Markphd:
What amp/receiver are you using? I am just currios. Regarding the 6.1 - I am not crazy about it, but I will be ready for the future, and I don't have to upgrade any time soon.
As for me I will stay for now with the Index/Trikan/Unik/Afekt speakers + NAD T753. I think next upgrade will be the front speakers - I thinking on the Ninkas as well.

Plamenz. Over the last few months, I have been in the process of converting from 2 channel to an HT. I don't have the complete set-up yet. I have Ninkas and a Trikan for the front, and Katans for the rear. I also have the Linn AV5125 five channel power amp. I am just now looking for a pre/pro. The reason why your thread caught my eye is because you're doing almost exactly what I was thinking of doing a few months ago. I was initially planning on using a somwhat smaller speaker package with Uniks as part of the system. I was also going to use a NAD T753 and then start upgrading from that starting point. However, I got sidetracked by some deals on AudiogoN that I couldn't resist! I'll end up with a much better system, but it's going to take a bit longer to be able to afford it all. In view of what I already have, I'm about 99% sure that I'll finish it off with a Unidisk SC. What the heck, why not. I'll just eat dog food for a year in order to afford to pay for it.