Hi Dineth,
I've had a 10" collapsible SW since 2009 and have had no problem with it. The mirror is still in very good shape (but then, I store it inside). The SuperPlossls that come with it are pretty good, too.
If you want help with finding stuff in the sky, you can always turn the 'scope into a 'Push-to' system later on by installing say, a Nexus II system. I have one on order.
I'm sure you'll have fun though, whatever you decide to get!
Edit: 1. SW is pretty good
2. IMHO, GOTO is more stuff to go wrong, can be noisy. A push to system can be cheaper and faster to use (like the Nexus II) - you can use your phone or laptop to track where your telescope is pointing. The phone/laptap then shows you where to push your telescope to find something - with pretty good accuracy by all accounts. But then, I'm biased
.
3. I've had no problem with F4.7 when using the eyepieces that I have, nor with collimating the 'scope.
Cheers,
Nicholas