Some question. Please help!!!

[buileminh]

Hi,
I am making new forums based on vBulletin v3.8 and will have about 5k - 30k members, 100-1000 users (guests + members) online at the same time. My vBulletin is hosted on a SHARED server, therefore, i should care much about the server load/system performance. I am planning to install these mods:

These mods are important to me:
- vBSEO
- vBExperienced
- Login to User Account
- Limited Guest Viewing

These mods are optional but i like them:
- Quick Editor Improver
- Thread Listing Make-Up
- Youtube/Google video downloader
- [Ajax] Check for similar thread before posting a new one
- Automatic Thread Tagger for vB3.8

Please anyone tell me:
1. About impact on server load/system performance:
- a) Which MODs for vB3.8 have much impact?
- b) Which MODs for vB3.8 have very small impact?
- c) How about these MODs: vbSEO, vBExperienced, Thread Listing Make-Up, Limited Guest Viewing, Login To User Account, Quick Editor Improver

2. Which MODs you will recommend as you have ever experienced (not guess or think!)? How about the impact on the server load/system performance?

[SEOvB]

you wont be on shared hosting very long. youll need a vps at the very least to have 100 users online at a time

vbseo, vbexperience have significant resource requirements