Originally posted by steve500 I start to feel a little sick wondering if I should switch to a nikon D90 body... I don't have much for lenses for my pentax other than a few basics, but seeing the large and very easy to get variety for nikon just standing there in my face teases me. The D90 body is sweet, maybe not built as well as the K20D but surely feels and seems like it outperforms EASY.
- it "seems" to outperform the K20?
- D90 body is "sweet" - but "not built as well" as the K20?
What do you really want and need?
That is the only question you need to answer. Do you need really long and fast lenses (300/2.8 - 400/2.8 etc.), than you HAVE to switch to Nikon or Canon.
Do you often(!) shoot fast moving sports or action - than you could be better served with Nikon and Canon IF you invest the accordingly necessary fast glass.
Do you need the (very limited) HD video capabilities - than you go for ther D90.
Do you dislike the K20's menues, buttons and dials - than you should TRY a Nikon - perhaps it feels better for you.
You see, the point is, you only wrote about your feelings, no hard facts, why you would consider switching. ASo it is nearly impossible to "talk you out" of anything.
One thing is clear to me: To really gain ANY advantage out of a Canon or Nikon camera, one needs to invest heavily(!) into lenses, which you may not find in the Pentax portfolio. I always find discussions ridiculous, when people complain about the poor Pentax performance versus superior CaNikon cameras, but then use kit lenses and other crap as the basis for comparisson.
There can be found a couple of hard facts, which will force a photog to use a camera system. But these advantages always come at a price. If one switches or buys into systems for cheap, one does not gain any advantage.
Also, from your post I read, that the advantages of the D90 seem to be more perceived than experienced. Rent the Nikon equipment you consider for buying over a long weekend and try it, before you buy it. After that you can make an informed decision.
Ben