Do not know if the suggestion link thingy even works anymore so I'm just going to dump the suggestions here. Some maps suggested may already be in the map pool but probably not.
Tier 2:
surf_noble
surf_sandtrap
surf_sandtrap2
Tier 3:
surf_dyhana
surf_hob
surf_jaqen2
surf_minimumwage
surf_not_so_quick
surf_orbion
surf_palm
surf_wizard
Tier 4:
surf_axiom2
surf_hero
surf_highlands