I personally have about 5-6 sets of gloves. if you are just doing it for exercise i would recommend these harbinger bag gloves ( http://www.harbingerfitness.com/flas...loves/320.html )

they arnt heavy so you can throw twice as many punches in quick succession + if you want to build up strength, buy atleast gloves weighing in at 10 oz, i've got a 12 oz pair and they are good for building up power in the arms.
My ones are respect sports ones, but any other make would be good enough i geuss.