Help with digital SLR choices

[blacknife]

I have a d-200 with that 18-200 lens, It is a good all around lens but i wish i had a few others to go with it. when taking pictures of my tank and other things i wish i had an actual macro lens. I find sometimes when taking downward shots the weight of lens trys to pull the zoom out, i am not sure if it is just my lens in paticular or all of the 18-200's that do this, i have been forgetting to call nikkon or a camera shop to ask about it. There are not to many times where this bothers me but it is just that little bit of annoyance. If i knew the new gen of slr's was going to have video capabilities i would have waited a year, oh well i will have to upgrade or buy a camcorder instead