If you do increase the power level of the SM spells, be very careful about which 3rd party supplements you use. We have a summoning specialist in our party with Augment Summons (T&B), Conjure Mastery (BoEM), and a ring of blue conjures (also BoEM) who is...pretty scary.
From his SMVII list, with all of the above:
Elemental, Air (Huge): HD 21d8+168; 262 hp; Init +15 (+11 Dex, +4 Improved Init); Spd fly 100ft (perfect); AC 31 (-2 size, +11 Dex, +8 natural, +4 deflection); Melee +24/+19/+14 (2d8+10 slam);Face 10ftx5ft; Reach 15 ft; SA Air mastery, whirlwind; SQ Elemental, DR 10/+2; AL N; SV Fort +14, Ref +23, Will +7; Str 24, Dex 33, Con 24, Int 6, Wis 11, Cha 11; Listen +23, Spot +23; Dodge, Flyby Attack, Improved Initiative, Mobility, Weapon Finesse (slam) (MM 81)
...and that's not counting the potential for buffing it with, say, adrenaline surge or it plus the rest of the party with mass haste...
J