I have been using the same Westwood mower for almost 13 years. It has twin decks giving a 42 inch cut. Grass collection is via a brush system. I have no experience of a blow collection system and have found the brush system to be very efficient. I have about 0.75 acres in grass.
I'm not sure what the present day equivalent mower in Westwood is. I have found this one to be very reliable even though not regularly maintained. I have replaced the battery twice and the cutter switch twice. Otherwise I have had no outlay on repairs.
Good luck with your choice.