Dear Inna,
Apologies my friend. I said the answer to the question was a simple one but I didn't say its implementation would be ;^)
I guess what I'm really trying to say is that we will never be truly happy unless our choices are pleasing to us.
You missed another most important condition : dealers tend to be franchised and limit the number of different alternatives they offer so they'll be plugging whatever big name turntable comes into your head and possibly one or 2 other big names (if we're lucky) so it becomes physically impossible to evaluate all the permutations you describe. In a way this is probably a blessing ;^)
Having said this a good dealer (assuming folk have access to one) will take some of the guesswork out of it.
One thing which becomes clear from visiting many different dealers is that it is possible you may not like ANY of the items on offer, reinforcing the importance getting something that you DO like.
All is not lost though. Even though the T/T may not be 100% favourable, another aspect of turntable management is the "tuning process". You can have a barrowload of fun with this : turntable mats, clamps, weights, periphery rings, earthing main bearings, variable tonearm damping (some arms have a well for damping fluid), removing energy "drains" from your turntable and tonearm, removing extraneous mechanical resonators from your turntable, changing the type of support, re-building your house etc etc.
The sky's the limit...
In reality I wouldn't recommend doing half of this stuff but rather explore choices that make the more drastic ones unnecessary?
I make it sound like it is the most hateful thing on Earth but in fact I wouldn't consider existence meaningful without a turntable. It allows access to the music in a way that nothing else can. It's all worth it in the end :)
All the very best,
