Fall Arsenal Help

I'm a fairly new bowler. I joined a summer league after not bowling since youth league 17 years ago. I started with a 150 average and ended the 13 week league with a 169 average. I was up to 180 at one point before I started changing some things with my approach. I really enjoyed it and bowled my first 600 series (a 663!) and won highest handicap series for the season.

I've currently got the following in my bag:

• Storm Hyroad Nano - first out of the bag and usually used most of the first two games. Sometimes used for all three games depending on how I'm feeling while throwing it.

• Storm Son!q - I usually end up finishing the night with this ball once I start hitting too light.

• Tropical Storm - usually stays in the car, used to be my spare ball.

• Storm Clear - I recently added the Storm Clear and love having a plastic as a spare ball. I should have gotten one sooner.

I'd guess I'm somewhere between 300-350 revs with around 15.5 to 16 mph at the pins. I have a 4 step approach and I line up around board 30 (right-handed) and aim at the third arrow.

I feel like I need something between the Son!q and the Tropical Storm. I was trying to decide between a Hyroad and Hyroad Pearl. Which one would provide more variety with my current line? Any other suggestions?

I also have been thinking about getting an asym...any suggestions here and thoughts about where it would fit in my lineup?