Not sure what price youre getting on the Skywatcher but the one I've seen you can get 2 x Tele Vue DeLites for the same price or go with a 24mm Panoptic and 13mm T6 Nagler for a little more. Then later get the 9mm Nagler when you can afford 'Tele Vue', (these three are a very nice combo). This way you are two thirds of the way there if Tele Vue is your ultimate goal
The Tele Vue eyepieces are very fine eyepieces in ANY telescope and you may one day own other telescopes and not have to worry about whether the eyepiece is suitable. The only thing that may change is what focal length you need but that is the same for any eyepiece. Also ask yourself if you need 20mm eye relief if wearing glasses or just that you prefer it as it will limit your choices to those eyepieces which offer long eye relief.
See
http://televue.com/engine/TV3b_page.asp?id=214