Recommended Eyepieces

Hi,

I was wondering if any of you have advice on eyepieces.

I've only got a cheap Bushnell reflector, and being only an occasional
astronomer, can't justify the expense of a better telescope, but would
like to get better views at higher magnification than the cheap
plastic things I have now!

So far I've only ever looked at the moon - and was impressed at 20mm
and pretty awestruck at 4mm, if only to see the inside of the crescent
(its got a name, I know!) in it all its rugged glory (you know, the
contours of the craters and all that). But obviously, I could tell the
4mm eyepiece was less than state of the art.

So I'm wondering what eyepiece to get...

What else do I want to look at? Well, the planets... if I could get to
see the rings on saturn that would be great. Other stuff - I dunno,
stars are stars for the most part... some general deep space poking
around perhaps, but I don't see this ever becoming a 'serious' hobby -
just something to dip into when I want to get a sense of where I am in
the scheme of things, contemplate the mysteries of life, that kind of
thing.

So I'm looking for something that'll give me sharper images of the
moon than my 4mm plastic Bushnell, and will let me see more of the
planets than I can with the naked eye (ie. more than just bigger!).

The bushnell is a 600mm reflector, 0.965" eyepieces. It does have a
1.25" adaptor thing - but I'd need then to get a whole set of pieces,
whereas if I got 0.965" then I could use them with my bushenll 20mm,
which I'm fairly content with (I'm not too hard to impress).

Any ideas? I've seen a Meade 0.965" 12mm second hand, which I'm guess
would be an improvement on my 4mm bushnell (?), but anyone got an idea
of what I could cheaply (2nd hand or new), and where to get them?

I could probably do with a decent barlow too.

thanks,
Pete