It really depends what are your need (and expectation).
- The Celestron Ultima a not bad, but I'm pretty sure you are stuck with their zoom eyepiece...
- I'd look for a Regal, or if you browse market place, there are always interesting stuff turning up.
Personally, once you've played with quality fixed eyepiece, it's hard to go back to a zoom. (you'll lose of FOV/eye relief). 25x LER is probably the one I used the most.
- I used to have an older Kowa spotting scope, and something "happened" to my eyepiece... before the Internet-days, getting a replacement was kind of a challenge...
- Probably still have a few Spacemaster laying around, they were good enough for pistol shooting (20y-50y)... The wife was using a 20 (or maybe 22x) eyepiece... and when we were mostly shooting indoors (winter league) I'd use a 15x eyepiece... that is, until the wife tried it wanted one of her own. Being the nice guy, I just gave her mine... thinking that I'd just buy another... Long story short, we stopped shooting bullseye before I found another one... I have since learn that the Opticron HR eyepiece work, and are supposed to be real nice...
Anyway, that's the reason why I went with the Pentax, 1.25" eyepiece easy to come buy... and star-watchers (like birder) can be picky about.
For your budget, if you don't need something waterproof. The Kowa TSN-1 can be had for reasonable $ from Japan. There's at least two local birders that went that route and are happy with their purchase.
- While ED glass are nice, if you're not into birding, use it in low light... we've done without it for quite some time...
Just to throw another wrench in the discussion. Scout the bird forums.