[JJDOBBER79 (Jas)]

Hi all,
I am starting to think about building a high end EP collection. Slowly, of course to be kind to my wallet. After much research and reading reviews. I have decided on televues. I have carefully considered XW and LVW, I get the impression (from reviews) the xw will be less than perfect for a 12" dob. (which I plan to have for a long time) and the LVW has mixed reviews, most good but very rare to hear a bad review about TV's. Anyway, I have a couple of questions for those more knowledgeable.
1.) Would, for example, a 12mm nagler in a 2x televue barlow be equivalent performance to a 7mm nagler.
2.) What is the difference between a TV Barlow and a powermate.

My initial plan is to buy 2 EP and 2 barlows (assuming the answer to question 1 is yes)
The 2 eyepieces are 12mm nagler and 35mm panoptic. If I couple these with a 2x and a 2.5x I will effectively have a 35, 17.5, 12, 8.75, 6, 3 (not that i would use the 3). This sounds to me like a very good range. Probably could add something like a 24mm later. Am I on the right track with this.
If so, I would probably start with the 12mm nagler and the 2x because I have the low power end covered (not with quality but enough to get me by for now). Any thoughts on this would be aprecciated.
Also, am I likely to get large crisp views of the planets with the high power nagler 12mm with a 2x. I know it depends on the seeing but I had a cheaper 6mm plossl and I could get the planets big but they were always blurry. Unfortunately, I havent really looked through quality eyepieces due to there being no club round here so I have no idea what to expect.