BOB is an awesome stroller that will last you well beyond when the LO outgrows the infant seat and it would perform well jogging and on the terrain you described.
Also you are not supposed to jog with your infant until they have adequate head and neck support, which the manufacturer says 8 months when placed directly in the stroller. Some people think it's ok to do it sooner with the car seat, but I erred on the conservative side.
Therefore the inexpensive snap and go would be the best solution right now. You can buy find them second hand for $25-30. You might get up to a year's use out of it, but a lot of people stop carrying the infant seat sooner as it gets too heavy.