I have most of mine. My top 5:
1. MP5 (Own. Mine is an Omega clone)
2. HK91 (Own. Mine is a PTR clone)
3. 1911 (Own a Colt Combat Elite)
4. Beretta 92FS (Own a 92 Brigadier)
5. HK G36 (Don't own. Hoping HK brings the HK 243 over to the states someday)