Ah, a person right after my own heart!!
I *love* the Lavenders/Blues. I have Blue Girl, Blueberry Hill, Enchanted Evening, and Lagerfeld right now. I also have Outta the Blue, Purple Passion, Intrigue, Heirloom, Paradise, Paradise Found, Kordes Perfecta, Barbara Streisand, Stainless Steel...
I'm getting in Blue Skies, Rhapsody in Blue, Shocking Blue, Stephen's Big Purple, .. uh.. can't think right now. I'm on the lookout for Moonlight Magic.
My two Lagerfelds came from Home Depot and they've done magnificently! And, you can't be colder than myself.
Trick is to MULCH MULCH MULCH! Blue Girl is the bluest of all of them, personally, Enchanted Evening is a blooming idiot, Blueberry Hill is a fun little rose. Intrigue smells like heaven, Outta the Blue has a gorgeous inner color (it practically glows), Purple Passion is also a "glowing" rose. Paradise & Kordes Perfecta are nice, but I cannot wait for Paradise Found, which is supposed to be the gorgeousness of Paradise, but with a scent! Stainless Steel I'm waiting to see if it performs better this year.. last year it was sooo wet that everyone didn't do well.
Hope this gives you some ideas? Here's one of my Lagerfelds.