You're welcome, Bharat11.
I own the new PSR-E443 (released this year), as well as the previous PSR-E433 model (released two years ago), and am happy with both of them.
It's true that some of the Casio models have more features-- in particular, I've been strongly tempted to buy either a CTK-7200 or WK-7600 (identical to the CTK-7200 but with 76 keys instead of 61 keys). The CTK-7000 is the previous version of the CTK-7200 and is very similar to it, but one thing I like about the CTK-7200 over the CTK-7000 is that the CTK-7200 has 9 possible settings (from 0 to 8) for the 9 drawbar organ slider controls, whereas the CTK-7000 has only 4 possible settings (from 0 to 3).
Before I bought the PSR-E443 I struggled with the decision to buy a CTK-7200 or PSR-E443, but decided to get the PSR-E443 for "research and development" reasons, as I'm working on a utility program for the PSR-E433 and I want to make it compatible with the PSR-E443 as well. Actually, I'd also like for it to be compatible with all of the previous models (PSR-E403, PSR-E413, and PSR-E423), plus the PSR-I line (PSR-I425 and PSR-I455), as well as the YPT-4 line (YPT-400, YPT-410, and YPT-420), so I'd love to be able to buy all those models for "research and development" as well, but I should be able to get by with asking owners of those keyboards to send me some files to test with.
Getting back to the issue of style files, Yamaha has had different versions of style files, and the PSR-E443 uses an older version (SFF1, not SFF2), plus it can use only half as many variations (A/B, not A/B/C/D). For some people this is a "deal breaker," because they want to be able to use the newer SFF2 types of styles and have access to all 4 of the variations. I'm telling you this now so you won't go buy a PSR-E443 and then find out afterward about this particular limitation. I'm not trying to dissuade you from getting a PSR-E443; I just want you to know its shortcomings so you'll be in a better position to make an informed decision.
Despite its limitations, I'm happy with my PSR-E433 and PSR-E443. I'd love to step up to the next higher model-- the PSR-S650-- or even higher than that, but unfortunately price is a major factor for me right now.
As for the CTK-7200, it doesn't cost that much more than a PSR-E443 and in many respects it has more features, but I really like the way the PSR-E443 sounds. I haven't heard how the CTK-7200 sounds, but I have a much older Casio (CTK-710) and my nephew has a not-so-old-but-not-so-new Casio (WK-110), and I definitely think my two Yamahas sound better overall than the two Casios I've heard. But I'd definitely like to get a CTK-7200 or WK-7600 some day, if only so I can do an in-depth comparison with the PSR-E443, but also so I could write some utility programs for it.
Edit: Regarding the issue of SFF1/SFF2 styles and the number of variations, there are a number of free utility programs you can use to convert SFF2 style files to SFF1 style files, remove any parts you can't use (i.e., variations C and D), and "revoice" the style to use only voices that exist on the PSR-E443. So even if a particular style file isn't directly compatible with the PSR-E443, you can still modify it as needed to make it compatible.