Melt 2 tablespoons butter in large pot over medium heat.
Add onion. Cook 3 to 4 minutes until soft.
Add 3 cloves garlic. Cook 30 seconds.
Add rice. Stir to coat. Toast 1 minute.
Add broth, salt, and pepper. Stir.
Bring to boil over high heat.
Reduce to low. Cover with lid.
Simmer 15 to 18 minutes until rice is tender. Do not lift lid.
While rice cooks, pat shrimp dry. Season with salt and pepper.
Transfer cooked rice to serving bowl. Cover to keep warm.
Melt 4 tablespoons butter in same pot over medium-high heat.
Add 6 cloves garlic. Cook 30 seconds.
Add shrimp in single layer. Sprinkle with paprika and cayenne.
Cook 2 to 3 minutes per side until pink and opaque.
Add lemon juice and parsley. Toss together.
Serve shrimp over rice. Garnish with lemon wedges and parsley.