@TS, I don't know where you are located, but eBay will never have the variety and convenience you need for something like this. There are dealers for Lancool all across the country, and CM is pretty well-distributed too.
In any case, any cabinet other than the bijli will definitely be an upgrade (IOW, not a waste of money). It's not going to be able to accept a very big cooler, and the airflow will choke as you add hardware.
I would urge you to check the seating of the cooler after you change the paste. Unless you have historically used toothpaste or exceptionally low-quality products, it is not common for it to dry up. The only times it does is extreme heat (not CPU levels, much higher) or gaps between the metal surfaces where air gets in. Most industrial thermal compound can handle over 200 degrees constantly as semiconductors (not the ones in a PC) can reach 150 degrees or more under stressed conditions. Drying out is a much bigger problem in those kind of situations, and since metal tends to expand under heat, if the pressure on the device is correct the heat transfer actually improves as temperatures rise. However, and gaps between surfaces also tend to grow larger and if the mating is not correct the device will overheat.
After you do this for a few days, you can look at a new cabinet. The Lancool won't disappoint.
In any case, any cabinet other than the bijli will definitely be an upgrade (IOW, not a waste of money). It's not going to be able to accept a very big cooler, and the airflow will choke as you add hardware.
I would urge you to check the seating of the cooler after you change the paste. Unless you have historically used toothpaste or exceptionally low-quality products, it is not common for it to dry up. The only times it does is extreme heat (not CPU levels, much higher) or gaps between the metal surfaces where air gets in. Most industrial thermal compound can handle over 200 degrees constantly as semiconductors (not the ones in a PC) can reach 150 degrees or more under stressed conditions. Drying out is a much bigger problem in those kind of situations, and since metal tends to expand under heat, if the pressure on the device is correct the heat transfer actually improves as temperatures rise. However, and gaps between surfaces also tend to grow larger and if the mating is not correct the device will overheat.
After you do this for a few days, you can look at a new cabinet. The Lancool won't disappoint.