siguro sir sa 30k to 50k.
i'm assuming thats for both the receiver and speakers right? if so, I would strongly suggest doing a 2.1 or 2.0 set up first. becase when you push for a 5.1 system with a very constrained budget, you will end up with speakers that you dont like, or a receiver that you dont like and before you know it you are either selling one of the pieces or all of them just to upgrade to something better.
Whats fun about this hobby is starting from scratch and building around the toys that you chose because you like them, not because its what you can afford. so with a 50k budget, for HT and Music use, I will look for these brand of speakers to listen to, Polk audio, PSB, Mission, Wharfedale, Klipsch, B&W(bookshelf). Then match with with a 2nd hand receiver from the marketplace. We have some very reputable sellers that are real gentlemen and would be willing to ship items to you at rock bottom prices.