Alternatively, choose a bare bulb without housing if you already have experience with replacing bare bulbs and are willing to deal with the more challenging replacement process.
If you do not want to compromise on projection quality and reliability, choose an original manufacturer lamp.
If you prefer a cheaper option and projection quality and reliability are not your top priorities, buy a generic lamp.
A suitable compromise is an original bulb inside (or Diamond) lamp. It provides the quality of an original lamp, although for a better price.