Apache Modules?

I'm trying to finalize a LAMP build on RHEL 5, PHP 5.2.11. What modules are absolutely necessary for future growth?

Currently I'm running:
core prefork
http_core
mod_so
mod_auth_basic
mod_auth_digest
mod_authn_file
mod_authn_alias
mod_authn_anon
mod_authn_dbm
mod_authn_default
mod_authz_host
mod_authz_user
mod_authz_owner
mod_authz_groupfile
mod_authz_dbm
mod_authz_default
util_ldap
mod_authnz_ldap
mod_include
mod_log_config
mod_logio
mod_env
mod_ext_filter
mod_mime_magic
mod_expires
mod_deflate
mod_headers
mod_usertrack
mod_setenvif
mod_mime
mod_dav
mod_status
mod_autoindex
mod_info
mod_dav_fs
mod_vhost_alias
mod_negotiation
mod_dir
mod_actions
mod_speling
mod_userdir
mod_alias
mod_rewrite
mod_proxy
mod_proxy_balancer
mod_proxy_ftp
mod_proxy_http
mod_proxy_connect
mod_cache
mod_suexec
mod_disk_cache
mod_file_cache
mod_mem_cache
mod_cgi
mod_php5
mod_proxy_ajp

I've also install PECL Uploadprogress. Drupal is giving me a green bill of health on the Status, I just want to be sure I have everything, and maybe more importantly, how many of these I can disable to free up some resources.

Thoughts?