Changing steering wheel is a journey. i have used many types steering wheel from momo tuner, momo race, sparco D racing wheel, nardi wooden torino, nardi leather torino, but till date. i still like deep dish steering wheel for the steering and driving feel. i've tried many, but many did not suit my style. Momo prototipo is one of my favorites now.
my suggestion is just, browse mudah. and type in Momo/nardi/sparco or any brand u want. Set your budget, and get the steering wheel. If it doesn't suit you, you can always change to another 1 and easily sell off your old steering wheel. (some will keep as collection). Also, beware of imitation steering wheel as it is dangerous to use on the road..
As for bosskit, you can get halfcut ones from Evo3 . it dosn't cost a lot. You also want to avoid fake bosskit, as some of them are prone to cracking and quality issue.