Some beginner system advice please

[Pandora]

I am a long-time lurker of this forum, but I have finally managed to find the time and budget to put together a decent DIY audio system. I have gotten a ton of information from this and other forums, but I have been having trouble putting everything together since most discussions only deal with a certain component or are over my head.

I have recently put together a gainclone which I will be using to run the woofer and tweeter, and I planned to build a passive crossover for them.

This is what I had in mind based on reviews and comments:

woofer: http://www.parts-express.com/pe/show...number=295-370
or
http://www.partsexpress.com/pe/showd...number=264-850

tweeter: http://www.partsexpress.com/pe/showd...number=264-835

If a full-range driver is better for my application, I am open for suggestions in that area as well. I am worried whether the gainclone will have enough power for options I listed or if I should go with a more sensitive driver.

The subwoofer setup, more specifically the subwoofer amp, I am more up in the air about. Are there any good beginner DIY options for a sub amp out there, or should I be looking for an off-the-shelf 100W amp. This is what I was looking at getting for a sub:http://www.partsexpress.com/pe/showd...number=264-833
but I am open for suggestions.

Some additional notes:
- size is not an issue, I can go bigger if it is better
- my budget (excluding gainclone) is about $300, but I would bump that up if is REALLY necessary.
- I have the tools and workshop to do all necessary woodworking
- I am very new to the diy and home audio scene. I understand most of the concepts from reading this and other sites, but my practical knowledge is almost non-existant.
- This setup will be used for both listening to music and as a home theater set-up.

Mods, if there is a better section for this post, feel free to move it.

[augerpro]

Are you able to take measurements of the drivers in the speaker box? If you can't I would try to find an established design on the web and just build that.

If you do design your own speaker those TB W4-704's are an excellent choice. Should be very easy to work with for a first timer. Not so sure about the tweeter though, I think you can do better than those.

That TB sub is really cool...but I wonder if there is a better option for the money. Maybe the 10" Mach5 Audio with a plate amp? I think the sub will push your project over $300 even with a cheap option.

[Pandora]

Would something like this be better for the tweeter:
http://www.partsexpress.com/pe/showd...number=264-524

I am a little worried on whether my gainclone can power these as well as a woofer.

For the box design I was going to run the driver parameters through winisd; is there a better option?

I was also looking at this for a sub option:
http://www.partsexpress.com/pe/showd...number=264-862

Also, what kind of specs and output should I be looking for in a plate amp?