Hi Amitava,
Although I have not heard them all, but from your list my guess is that the RPM Genie 1.3 with an Ortofon 2M Red cartridge may be the best one. However, there is no dust-cover with it (Debut III has the dust-cover as standard). But one can get it made at low cost (approx Rs 1K) in Kolkata.
I do not know how much prior experience you have in setting up a turntable. If you do not have at all any, my humble opinion is against buying an used TT. Properly aligning a cartridge is an expert's job. If done incorrectly, it does of course produce poor sonics, in addition it may harm your records too. Anything that has a potential of harming the source (music) media is strictly unadvisable. While there are many self-proclaimed experts in the used market in Kolkata, I have found none with the proper knowledge. So unless, you have experience, this is not the best route to take.
My suggestion would be for you to get a new TT where the cart is factory fitted and aligned. The user only has to do the tone arm balancing and adjusting anti-skating etc which are much easier to do following the instructions. I believe the TTs you mention may come with the cartridge already fitted to the headshell of the tonearm.
During use one becomes more comfortable tweaking settings etc, can learn all trades of the game. It is then sensible to consider used TTs some of which, after proper rehab and set-up, may give you satisfaction at a completely different level for a reasonable cost.
If you are already a very experienced person in setting up a TT, please ignore everything after the first paragraph.
Regards.