There's lots of choices out there, I'm no expert on Vixen, Pentax and other designs, nor am I an expert on Televues. That said, after viewing through several Televues, they're on my hit list to buy. That's a personal choice. For the time being, Alexander's advice is a good'un - the GSO 15mm plossl is a good eyepiece. Andrews sells them for $29, which is a bargain imho. I actually have this eyepiece, and it's one of my faves. If you have a 2" focuser, I'd also recommend the Andrews 30mm 82º eyepiece. It's not super sharp to the edge, nor is it perfect, but for the price, it's a cracking lens imho. Get a 2x GSO barlow and you've got some variety.
If you want a brighter eyepiece and more magnification, then you don't have much choice other than to go for the more expensive designs. I've included a link to a page that I found helpful, hope it helps you:
http://www.bpastro.org/index.php?pag...ting-eyepieces
Dave