Planning to buy a sony PS3 looking for some tips.

where to buy? is it advisable to buy in Sony directly? or ok lang din dun sa mga gaming shops? same lang ba sila ng price?

AFAIK you can already store games dun sa HD? how can i save games? kagaya ba siya ng iphone na dapat ipa jailbreak? can you play your saved games and at the same time play the CD games you bought?

im using an LED TV may kasama ana bang HDMI cables yun? and is it a must to use HDMI cables?

any additional information and inputs is highly appreciated.

thanks mga ka tsikot!