I did a search of this thread but came up empty, apologize if this has been answered in past 3000+ posts.

I used miles to book a RT LGA/ORD, which flies the ERJ. According to seatexpert.com, the only 'better' seats is first row of economy, #5. But according to delta.com site, they're offering economy comfort seats for the first 4-5 rows of economy: $29 each way for these seats plus early boarding.

I've not flown Delta in years....appreciate the help.