First, I think it depends a bit on what age you are. Lasik usually does a fantastic job of correcting your vision but it cannot do anything about the natural aging process which leads many people to needing reading glasses later in life. That will happen or not regardless of whether you keep wearing glasses, contacts, or get Lasik. If you get Lasik early in life then you have many more years of total glasses-free vision to enjoy versus if you get it in your 40s, looking at potentially needing reading glasses in the near future.
When I did the calculations personally, glasses came out ahead money-wise. However for me, not wearing glasses has such an ENORMOUS quality-of-life value that Lasik has been one of the better things i have spent money on in a long time. (Note: I use the term "Lasik" loosely to mean Lasik, PRK, corneal implants, or other similar procedures depending on what you qualify for). Personally, I hated wearing glasses. Always having to clean them, they fog up when i run in the rain, the lack of peripherial vision, having to pay for and carry around two sets of glasses (sunglasses) all the time, not being able to see what time it is in the middle of the night, etc. I ADORE having perfect vision now.
You have your own values so make your decision accordingly.